EE-Learning
Electrical system of the heart
Catogry:
Science & Engineering
Subject:
Health & Medicine
Course:
Circulatory System Diseases
Lecture List
Contractility, Ea, and preload effects on PV boxes
Stroke work in PV loops and boxes
Arterial elastance (Ea) and preload
Arterial elastance (Ea) and afterload
Getting Ea (arterial elastance) from the PV loop
What is contractility?
Reimagine the pressure volume relationship
Increasing the heart's force of contraction
What is afterload?
Why doesn't the heart rip?
What is preload?
Reimagine the pressure volume relationship
End systolic pressure-volume relationship (ESPVR)
End diastolic pressure-volume relationship (EDPVR)
Understanding the pressure-volume loop
Drawing a pressure-volume loop
Left ventricular volume vs. time
Left ventricular pressure vs. time
Pressure in the left heart - part 3
Pressure in the left heart - part 2
Pressure in the left heart - part 1
Increasing the heart's force of contraction
What is afterload?
Active contraction vs. passive recoil
Sarcomere length-tension relationship
Frank-Starling mechanism
Preload stretches out the heart cells
Preload and pressure
What is preload?
Why doesn't the heart rip?
Getting a new heart
Autonomic nervous system effects on the heart
Increasing ventricular contractility - inotropic effect
Changing the heart rate - chronotropic effect
Changing the AV node delay - chronotropic effect
New perspective on the heart
Thinking about heartbeats
A race to keep pace!
Depolarization waves flowing through the heart
Electrical system of the heart
Resetting cardiac concentration gradients
Action potentials in cardiac myocytes
Action potentials in pacemaker cells
Permeability and membrane potentials
Membrane potentials - part 2
Membrane potentials - part 1
Why doesn't the heart rip?
Sympathetic nerves affect myosin activity
Calcium puts myosin to work
How tropomyosin and troponin regulate muscle contraction
Myosin and actin
Heart cells up close!
Three types of muscle
Compliance - increased blood flow
Compliance - decreased blood pressure
Stored elastic energy in large and middle sized arteries
Bernoulli's equation of total energy
Compliance and elastance
Pre-capillary sphincters
Three types of capillaries
Layers of a blood vessel
Fetal structures in an adult
Baby circulation right after birth
Fetal circulation right before birth
Double Bohr effect
Fetal hemoglobin and hematocrit
Foramen ovale and ductus arteriosus
Hypoxic pulmonary vasoconstriction
Flow through the heart
Umbilical vessels and the ductus venosus
Meet the placenta!
Aldosterone and ADH
ADH effects on blood pressure
ADH secretion
Aldosterone removes acid from the blood
Aldosterone raises blood pressure and lowers potassium
Angiotensin 2 raises blood pressure
Activating angiotensin 2
Renin production in the kidneys
General overview of the RAAS system: Cells and hormones
Parts of a nephron
Regulation of blood pressure with baroreceptors
Blood pressure changes over time
Putting it all together: Pressure, flow, and resistance
Flow and perfusion
Adding up resistance problem
Adding up resistance in series and in parallel
Resistance in a tube
Learn how a stethoscope can help determine blood pressure
What is blood pressure?
Circulatory system and the heart
Arteries, arterioles, venules, and veins
Arteries vs. veins - what's the difference?
Thermoregulation in the circulatory system
Layers of the heart
Lub dub
Arteries vs. veins - what's the difference?
Two circulations in the body
Flow through the heart
Meet the heart!